Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a classificação de temperatura do nível intermediário?
 ###Tabelas: CREATE TABLE north_dakota_counties_by_per_capita_income (north_dakota_counties_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE operation (operation_id AUTO_INCREMENT PRIMARY KEY, Maximum Ceiling Temperature VARCHAR, Temperature Rating VARCHAR, Temperature Classification VARCHAR, Color Code (with Fusible Link) VARCHAR, Glass Bulb Color VARCHAR) CREATE TABLE qualifying_games (qualifying_games_id AUTO_INCREMENT PRIMARY KEY, Game INT, Date VARCHAR, Batting 1st VARCHAR, Batting 2nd VARCHAR, Result VARCHAR) CREATE TABLE high_schools (high_schools_id AUTO_INCREMENT PRIMARY KEY, High School VARCHAR, Type VARCHAR, Established INT, Enrollment INT, Mascot VARCHAR, WIAA Classification VARCHAR, Notes VARCHAR) CREATE TABLE best_bowling (best_bowling_id AUTO_INCREMENT PRIMARY KEY, Bowling figures Wickets-Runs (Overs) VARCHAR, Bowler VARCHAR, Versus VARCHAR, Venue VARCHAR, Date VARCHAR)  
SELECT Temperature Rating FROM operation WHERE Temperature Classification = intermediate